Officials aren't sure how many people lived in the home, but they know a woman managed to escape.By Meghan Schiller

PITTSBURGH (KDKA) – A man was killed and two firefighters were injured after a fire broke out at a home in Pittsburgh’s Allentown neighborhood.

Pittsburgh firefighters were battling a fire with heavy smoke at a home on Knox Avenue Tuesday afternoon. Pittsburgh Public Safety sent out an alert asking people to avoid the area.

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The biggest issue fighting the fire was that the stairway to the second floor collapsed. Firefighters had to use a ladder to try to get to the man stuck on the second floor, but did not get to him in time.

The victim was identified by the Allegheny County Medical Examiner’s Office as 68-year-old Thomas Fox

Chief Darryl Jones says unfortunately firefighters found that man dead on the second floor. They can’t yet say how many people lived in the home, but know one woman did manage to escape.

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Two firefighters were injured — one with a groin injury and the other with a twisted ankle.

The home next door is separated by only a few inches, but miraculously the flames didn’t spread.

There’s been no word on the fire’s cause.

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Stay with KDKA for the latest on this developing story.

Meghan Schiller